The Sea Lion, is a mammal specie of pinniped of the Otariinae family; it's the solely specie of the genre Arctocephalus Pusillus. It's a friendly and peaceful animal, water inhabitant. Generally, accompanies the scuba divers swimming alongside them for long periods, reaching depths of 60 m. They differ from seals because of their visible ears and because they can easily walk on the ground -they are also called "walking seals"-, due to their back extremities, which are forehead oriented and functional for pedestrian translation, though they are better for swimming. Their eyes are adapted to underwater vision; their respiratory system is adapted for long immersions and their fur is slightly dense: they present a fat layer below their skin, with the purpose of term isolation, energetic preservation and flotation.
In comparison with cetaceans, they are amphibian, and for that reason they can stay outside the water. They can only give birth outside water: generally they bear only one baby, that is looked-after by the mother during 4-5 months; after that period, the young baby is left alone to be under its own self-care.